Grinding-mill.



PATENTED DEC. 25, 1906.

J 0. WOODCOCK.

GRINDING MILL.

APPLICATION FILED JUNE 11.1904. RENEWED SEPT. 19, 1906.

2 SHEETS-SHEET l.

l/WWW f Wm PATENTED DEC. 25, 1906. J. 0. WOODCOCK. GRINDING MILL.

APPLIGATION FILED JUNE 11.1904. RENEWED SEPT. 19, 1906.

2 SHEETS-SHEET 2.

Jag; 0. Wbdqoblc UNITED STATES PATENT orrron ,JJOHN c-wooDeoo oromLLrcor'nE, oHro. I

GRINDING-MILL. I h l Specification of Letters Patent.

PatentedDec. 25, 1906;

Application filed Julie 11 1904. Renewed e ptember 19, 1906. Serial No.335,312.

lo all it m /ay concern; i v

Be it known that I, JoHN C. WooDoooK, a

citizen of the United States, residing at Chillicothe,,in the county ofRoss and Stateof Ohio, have ented certain new and useful Improvements inGrinding-Mills; and Ido hereby declare the following tobe a full,

clear, and exact description of'the invention,

such as will enable others skilled in the art to which-it appertainstornake and use the same.

No. 610,220, dated September 6, 1898. In

r The objectof the present invention is to make an improvement upon thetype of mill illustrated in my patents of the United States, No.5616,869, datedSeptember 24, 1895,,and

such mills it is desirable that they be adapted to grind both coarseandfinecoarse for the cattle and finefor the family of the farmer. Toaccomplish this, it has been my practice to attach to the revolving coneeither a finegrinding ora coarse-grinding ring, the change being made bysubstitution. This substitut1on,'however, involved extensive segregationof the parts of the mill, and not only consumed much valuable time, butalsoinvolved considerable mechanical skill. In my present mill hereinset forth the change from coarse grinding to fine grinding'and thereverse involves little more than the raising and lowering of a lever.

In the accompanying drawings, in which I have illustrated one embodimentonly of the invention, Figure lis a centralvertical'sectional viewshowing the parts set for fine grinding. Fig. 2 is a view of the lowerportion of the mill, showing theparts set'for coarsegrinding. Fig. 3 1sa horizontal section on the plane :1; 90, Fig,- 1, looking down. Fig. 4is a similar view on the same plane looking up. Fig. 5 is a fragmentarydetail,

. partially in section, on the plane y y, Fig. 1,

on entering grooves i in the inner wall of, the outer cone. or shell.

.6 designates theinner cone that has pro,v

jecting upward from its apex a stem 7, pro vided with splines 7 aengaging groovesinthe The inner finene-grinding ring is designated 6 IThe inner coarse-grinding ring is provided with hooks 4 thatare adaptedto catch under lugs 6 on the inner fine-grinding ring 6 The innerfine-grinding ring is provided with a diametrlc bridge-bar 6?, in thecenter of which is hub of the spider-ring, so that the inner cone willbeirevolved' with the spider-ring. inner cone carries on its lower edgea coarsef, grinding ring 6*, that cooperates with they coarse-grindingring 4*.

, 5, glrir-iding ring that cooperates with the outer a bearing toreceive the upper end of a dead spindle 7 This spindle is supported on alever 8, pivoted in a hanger atone side of the base-frame 9 of the milland having its other or free end restin on an adjustable support 10 atthe other si e. A

Supported on the base 9 below the opening between the grinding-rings isshown a circu lar trough 11, having a discharge-opening 11 and withinthe trough is a revoluble bladed wheel 12, adapted when revolved tocarry the ground material to the dischargeopening. The means forcarrying the bladed wheel around can consist of afinger 6 secured to andreaching down from the cone 6 through the inner fine-grinding ring intoposition to contact with one of the blades.

The operation is as follows: With the construction shown the hopper andinner cone and grinding-rings are. turned with a socalled haw draft.When it is desired to grind fine, the lower inner ring is raised to theposition indicated in Fig. l, and when so raised thehooks 4 of the upperinner ring catch'under the lugs 6 of the lower ring. When it is desiredto grind coarse, the lower fine-grinding ring is depressed,'as seen inFig.

2. This can be accomplished by turning the hopper slightly backward, soas to disengage the hooks M from the lugs 6 and depressing the lever 8.When the mill is grinding coarse, the inner fine-grinding ring is atrest. It will be observed, therefore, that to change the mill from fineto coarse grinding it is only necessary to adjust the lever 8. Thecoarsegrinding ring 6 can be adjusted to vary the degree of coarsenessof the product by raising and lowering the inner cone 6, which carriesthe inner grinding-ring, a handled nut 13,

working on a screw 15 in the stem 7, being provided for this purpose.The fine-grinding ring 6 when hung on the hooks 4 can also be adjustedto vary the degree of fineness of the product by the same means.

Changes in the form of the parts shown can be made without departingfrom the gist of the invention.

What I claim, and desire to secure by Letters Patent, is

1. In a grinding-mill of the kind described, the combination of acasing, an outer coarsegrinding ring and an outer fine-grinding ringbelow the coarse-grinding ring within said casing, an innercoarse-grinding ring to cooperate with the aforesaid outercoarse-grinding ring, means for rotating said inner coarse-grindingring,means for ad usting said coarse-grinding ring to vary thecoarseness of its grinding, means for stationarily supporting and forraising and lowering said inner fine-grinding ring independently of theinner coarse-grinding ring and means for locking said inner finegrindingring to the coarse-grinding ring only when said inner fine-grinding ringis raised to cooperate with the inner fine-grinding ring.

2. In agrinding-mill of the kind described, the combination of a casing,an outer coarsegrinding ring and an outer fine-grinding ring below thecoarse-grinding ring within said casing, an inner coarse-grinding ringto cooperate with the aforesaid outer coarse-grinding ring, means forrotating sald inner co arsegrinding ring, means for stationarilysupporting and for raising and lowering said inner fine grinding ringindependently of the inner coarse-grinding ring and means for lockingsaid inner fine-grinding ring to the coarse-grinding ring only when saidinner fine-grinding ring is raised to cooperate with the innerfine-grinding ring.

3. In a grinding-mill of the kind described, the combination of acasing, an outer coarsegrinding ring and an outer fine-grinding ringbelow the coarse-grinding ring within said. casing, an innercoarse-grinding ring to cooperate with the air resaid outercoarse-grinding ring, means for rotating said inner coarsegrinding ring,means for st ationarily supporting and for raising and lowering saidlnner fine-grinding ring independently of the inner coarse-grindingring, means for locking said inner fine-grinding ring to thecoarse-grinding ring only when said inner fine-grinding ring is raisedto cooperate with the inner finegrinding ring, the circular trough 11below the discharge-opening of the rings, the bladed -wheel 12, and thefinger 6 reaching through the fine-grinding ring and engaging the bladedwheel 12 to revolve the same.

In testimony whereof I aflix my signature in presence cf two witnesses.

JOHN C. WOODCOCK.

